Mica pigments
United States Patent 3311485

Inventors:
Duwell, Ernest J.
Publication Date:
03/28/1967
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Assignee:
MINNESOTA MINING & MFG
Primary Class:
Other Classes:
534/726, 534/887, 534/576
International Classes:
C04B14/20; C09C1/00; C09C1/40; C04B14/02
US Patent References:
3079209Dyeing natural stones and shells with oil soluble dyes
3087828Nacreous pigment compositions